<template>
    <div>message的值:{{ message }}</div>
    <div>obj.message的值:{{ obj.message }}</div>
</template>
<script setup>
import{reactive,toRef}from'vue'
const obj =reactive({message:'黑发不知勤学早，白首方悔读书迟'})
const message=toRef(obj,'message')
setTimeout(()=>{
    message.value='少壮不努力，老大徒伤悲'
},2000)
</script>